Gut microbiome

Every gut microbiome claim we've checked against the studies, newest first, each graded from Solid to Debunked by the evidence in people.

An impressed man in his 20s next to a pink model of the human intestines with three white capsules in front of it
Oct 12, 2026 Grade: Solid

Donor gut bacteria cured 81% of a stubborn gut infection

A gut bacteria transplant cured 81% of people with a recurring gut infection, against 31% on antibiotics, and is now FDA-approved. We rank nine more gut claims.